"Compulsive" and "obsessive" have become everyday words. "I'm compulsive" is how some people describe their need for neatness, punctuality, and shoes lined up in the closets. "He's so compulsive is shorthand for calling someone uptight, controlling, and not much fun. "She's obsessed with him" is a way of saying your friend is hopelessly lovesick. That is not how these words are used to describe Obsessive-Compulsive Disorder or OCD, a strange and fascinating sickness of ritual and doubts run wild. OCD can begin suddenly and is usually seen a ....